diff mercurial/pure/parsers.py @ 47268:9d1a8829f959

revlog: signal which revlog index are compatible with Rust

Otherwise, Rust may treat python object like `cindex` object, leading to
trouble. The new attribute is an integer because I expect we might need a flag
field in the future.

As a start we get the rust code to raise a clear TypeError. We will use the
information in a smarter way in the next changesets.

Differential Revision: https://phab.mercurial-scm.org/D10665

--- a/mercurial/pure/parsers.py	Tue May 04 11:19:48 2021 +0200
+++ b/mercurial/pure/parsers.py	Tue May 04 14:16:26 2021 +0200
@@ -47,6 +47,8 @@
 
 
 class BaseIndexObject(object):
+    # Can I be passed to an algorithme implemented in Rust ?
+    rust_ext_compat = 0
     # Format of an index entry according to Python's `struct` language
     index_format = revlog_constants.INDEX_ENTRY_V1
     # Size of a C unsigned long long int, platform independent